Practical OTV


Practical OTV ————- This post is all about OTV (Overlay Transport Virtualization) on the CSR1000v. I wanted to create the post because there are alot of acronyms and terminology involved. A secondary objective was to have a “real” multicast network in the middle, as the examples I have seen around the web, have used a direct P2P network for the DCI.
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VxLAN on the CSR1Kv


By now, VxLAN is becoming the standard way of tunneling in the Datacenter. Using VxLAN, i will show how to use the CSR1Kv to extend your Datacenter L2 reach between sites as well. First off, what is VxLAN? It stands for Virtual Extensible LAN.
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ISIS Authentication types (packet captures)


In this post i would like to highlight a couple of “features” of ISIS. More specifically the authentication mechanism used and how it looks in the data plane. I will do this by configuring a couple of routers and configure the 2 authentication types available.
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Unified/Seamless MPLS


In this post I would like to highlight a relative new (to me) application of MPLS called Unified MPLS. The goal of Unified MPLS is to separate your network into individual segments of IGP’s in order to keep your core network as simple as possible while still maintaining an end-to-end LSP for regular MPLS applications such as L3 VPN’s.
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EIGRP OTP example


In this post id like to provide an example of a fairly new development to EIGRP which is called EIGRP Over The Top (OTP). In all its simplicity it establish an EIGRP multihop adjacency using LISP as the encapsulation method for transport through the WAN network.
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Trying out IPv6 Prefix Delegation


In this post i will show how and why to use a feature called IPv6 Prefix Delegation (PD). IPv6 prefix delegation is a feature that provides the capability to delegate or hand out IPv6 prefixes to other routers without the need to hardcode these prefixes into the routers.
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VRF based path selection


In this post I will be showing you how its possible to use different paths between your PE routers on a per VRF basis. This is very useful if you have customers you want to “steer” away from your normal traffic flow between PE routers.
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Using LISP for IPv6 tunnelling.


In this post I would like to show how its possible to use a fairly new protocol, LISP, to interconnect IPv6 islands over an IPv4 backbone/core network. LISP stands for Locator ID Seperation Protocol. As the name suggest, its actually meant to decouple location from identity.
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Short update


Its been a long time since my last update. I apologise for this. It wasnt my intention, it just sort of happened. In the meantime I have tried the CCIE SP lab and didnt pass it, so I am still studying for my next attempt which is comming up shortly.
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Fixing multicast RPF failure with BGP


In this post i would like to explain how you can fix a multicast RPF failure using BGP. If you take a look at the topology in figure 1, we have a network running EIGRP as the IGP and where R1 advertises its loopback 0 (1.
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Understanding the “NTP access-group” command in IOS.


NTP has always been one of those things I have found tricky to really lab up. Its fairly easy to setup, but verifying whether everything is working as you expect, can be hard because it takes a while to synchronize (and even unsynchronize).
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